NOS Yellow Jacket Tube Converter from MOD Kits DIY

The new Yellow Jackets NOS (New Old Stock) Tube Converter, designed with an NOS 6AQ5 seven-pin miniature beam power tube, is a limited edition converter made for use in most amplifiers under 100 watts and using 6L6, EL34, 7027 or 6V6 output tubes. The converter lowers the overall power in an amplifier and gives that amp a unique vintage tone.

Linear Audio Volume 7 is the eight issue of a series of printed bookzines dedicated to technical audio and perception. Compiled and published by our technical editor, Jan Didden, this series of bookzines aims to help spread technical audio information and knowledge in printed format.

You can build a tube amplifier that's similar to the original Nardeux Stereomatic 302 S. Follow these steps to create a powerful amplifier that produces satisfying music output.

With a circuit configuration known as series regulated push-pull (SRPP), you can build a low-power tube amplifier that doesn't require the infamous output transformer.

With a little know-how and some basic parts, you can design a hybrid amplifier in fairly short order. This project combines the best attributes of both tube and transistor technologies.

Which sounds better — a tube or solid-state amp? The "Great Debate" has been going on for decades. Now it's time to put the debate to rest. In audioXpress, November 2012, Richard Honeycutt's published this article exploring how to detect audio amplifiers’s differences in sound and the need for a correct subjective evaluation process of components and systems.

SHANNON BECKER: Tell us about your company Tortuga Audio. Can you also share the story behind your sea turtle mascot? MORTEN SISSENER: Tortuga Audio is a boutique audio design, manufacturing, and marketing company located in South Florida. At present we …

The simple one-story building, home to the Vintage Radio and Communications Museum of Connecticut, provides few clues to the immense, historical collection contained within its brick and mortar walls. The virtual time capsule is filled floor to ceiling with more …

Shannon Becker interviews Ken Heng Gin Loo, the founder of the diy-audio-guide.com website. Ken is of Malaysian Chinese origins, and studied in the United Kingdom, where he graduated in Electrical and Electronics Engineering (Honors) from the University of Manchester, UK. Today he lives in a beautiful tropical island named Pulau Pinang (aka Penang) in Malaysia. Ken has a passion for DIY audio, in particular tube amplifiers, Tripath amplifiers, high-efficiency loudspeakers, and high-quality audio reproduction. This article was originally published in audioXpress, December 2013.

Gregory Charvat—an engineer, professor, entrepreneur, and author—encourages people to explore the opportunities that come their way. SHANNON BECKER: Your interest in amateur radio equipment began when you were young and continued through your high school years. Can you describe some …